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We offer cats as an option that are 49 State legal with an EO Certification. Those that want to avoid cat inefficiency codes can do so with these cats. We use them on our C7 Corvette systems and they work extremely well.
Considering there's 40-45 sets sold, nearly half of which are on NA cars, no one is complaining about how well ARH headers work except those that don't have them. Go figure.
Nick
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